Rox

http://rox.sourceforge.net/
The ROX Desktop is based around the file system. Its core component is ROX-Filer, a graphical file manager that supports `application directories:' directories which contain an entire application. When you open an application directory in the filer the application runs. Therefore, installing an application is the same as copying a directory, uninstalling is the same as deleting, and to install two different versions of the same application just copy them to different directories on your hard disk. There is no need for special setup programs or root access. To read an application's help just choose Help from the filer menu to see it (it just opens a subdirectory inside the application * called 'Help'). There is no need for a separate filer and application launcher. The filer does both, and you always know where your programs are. It also has drag-and-drop saving, which means you can save by dragging the file back from the application into the filer. The desktop includes ROX-Filer, ROX-Session, ROX-Lib, Archive, System, memo, and Wallpaper.

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